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11 May 2017 2D numerical model for analysis of possible second-order interactions of ultrasonic waves with a presence of fluid and solid interface (Conference Presentation)
Andriejus Demcenko, Michael Mazilu, Rab Wilson, Jonathan M. Cooper
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Proceedings Volume 10169, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2017; 1016924 (2017) https://doi.org/10.1117/12.2261688
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States
Abstract
Non-collinear ultrasonic wave mixing for nonlinear ultrasonics is used for various NDT&E applications to characterize structure/material state. Experiments are frequently conducted using immersion ultrasonic techniques. In this configuration various wave modes are generated at the fluid-solid interface. We have characterised this scenario experimentally and developed a 2D numerical model to analyse the influence of the interface on the possible second-order interactions of the ultrasonic waves. The model is based on the decomposition of the ultrasonic wave into a superposition of monochromatic plane waves. As these waves propagate through the interface and solid, their nonlinear interaction defines a flow of energy between the different modes. Using the Murnaghan's nonlinear interaction potential, we have studied the efficiency of this energy transfer as a function different geometrical parameters.
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Andriejus Demcenko, Michael Mazilu, Rab Wilson, and Jonathan M. Cooper "2D numerical model for analysis of possible second-order interactions of ultrasonic waves with a presence of fluid and solid interface (Conference Presentation)", Proc. SPIE 10169, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2017, 1016924 (11 May 2017); https://doi.org/10.1117/12.2261688
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KEYWORDS
Ultrasonics
Interfaces
Solids
Energy efficiency
Energy transfer
Superposition
Wave propagation
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